30 Seconds To Mars - Attack Lyrics Meaning

I heard this one interpretation, thought about it, and it makes a lot of sense, so I'm going along with it.
The song is about drug addiction.
"I won't suffer [from the need], be broken [by the drugs], get tired [of staying sober, or maybe living] or wasted [this one's pretty obvious],
surrender to nothing, I'll give up what I started and stop it [drugs again] from end to beginning
A new day is coming [a new day, a new life, yadda yadda] and I am finally free [from it]
I would have kept you forever, but we had to sever [pretty obvious again and so on]
And then again the bridge can confuse you a bit, BUT it still makes sense, if you think about it.
Your promises, they look like lies [like when you're on drugs, everything seems better, easier, it's as if they promise you a better life, but that's not true obviously]
Your honesty, like a back that hides a knife [same as before, basically the drugs "show" you how good it can feel when you're high and back-stabs you by making it even worse than before afterward]
I promise you [here again, he promises to quit]
And I am finally free [and then he finally does :D]